CN103517489A - Driver used in lighting device, and lighting device having the same - Google Patents
Driver used in lighting device, and lighting device having the same Download PDFInfo
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- CN103517489A CN103517489A CN201210200466.7A CN201210200466A CN103517489A CN 103517489 A CN103517489 A CN 103517489A CN 201210200466 A CN201210200466 A CN 201210200466A CN 103517489 A CN103517489 A CN 103517489A
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Abstract
The invention relates to a driver (100) used in a lighting device. The driver (100) comprises a rectifier bridge (1) connected to a power source, a power factor correction unit (2) connected to the output end of the rectifier bridge (1), and a control unit (3). The control unit (3) is used to detect an input voltage (Vin) from the output end of the rectifier bridge (1) and an output voltage (Vo) from the output end of the power factor correction unit (2). The driver (100) further comprises a current compensation unit (4) connected to the output end of the rectifier bridge (1). The control unit (3) is used to perform comparison between the input voltage (Vin) and the output voltage (Vo). When the input voltage (Vin) is less than the output voltage (Vo), the control unit (3) is used to cause the current compensation unit (4) to provide a compensation current (Icom). Moreover, the invention further relates to a lighting device having the driver (100).
Description
Technical field
The present invention relates to a kind of driver for lighting device.In addition, the invention still further relates to a kind of lighting device with the driver of the above-mentioned type.
Background technology
In recent years, LED lighting device is promoted rapidly as a kind of energy saving and environment friendly lighting, is widely used in the fields such as reading lamp, flashlight, directing light of automobile, baby spot, label, building profile and dome illumination, portable flash lamp, medical illumination and decorative illumination lamp.The Switching Power Supply of the AC/DC converter in the driver of current LED lighting device is all connected with electrical network by rectification circuit, and its input rectifying filter generally consists of bridge rectifier and filtering capacitor, and the two all belongs to non-linear element.Existence due to large capacity filtering capacitor, makes the angle of flow of rectifier diode become very narrow, and near the only ability conducting peak value of AC-input voltage causes and exchanges input current generation serious distortion, becomes spike.In this current waveform, comprised a large amount of harmonic distortion, not only electrical network has been polluted, also caused the active power of exporting after filtering significantly to reduce, power factor is significantly reduced.Therefore, how to improve the power factor of the driver of LED lighting device, and reduce total harmonic distortion and become an important problem.
In the buck-type power factor correction circuit of driver, even, in active power factor correction circuit, total harmonic distortion is subject to the restriction of the relation between input voltage and output voltage.Input voltage is sinusoidal waveform.Its value is from 0 to maximum.When input voltage is during lower than output voltage, reduction voltage circuit do not work and in this time period output current be zero.Fig. 1 shows input voltage vin, output voltage V o and the time dependent graph of a relation of input current Iin.When time point t1 input voltage equals output voltage, input current is zero.Output voltage is higher, and the t1 time is longer and total harmonic distortion is just higher.Because longer t1 causes high THD, if some electric currents are added between t0 and t1, so just may obtain less THD.
Summary of the invention
For solving the problems of the technologies described above, the present invention proposes a kind of driver for lighting device, this driver has lower total harmonic distortion and higher power factor.In addition, the invention allows for a kind of lighting device with the driver of the above-mentioned type.
First object of the present invention realizes thus by a kind of driver for lighting device, and this driver comprises: the rectifier bridge that is connected to power supply; Be connected to the power factor correction unit of the output of rectifier bridge; And control unit, this control unit detects from the input voltage of the output of rectifier bridge and from the output voltage of the output of power factor correction unit, wherein driver also comprises the current compensation unit of the output that is connected to rectifier bridge, control unit compares input voltage and output voltage, when input voltage is during lower than output voltage, control unit is controlled the current compensation unit electric current that affords redress.In stage at input voltage lower than output voltage, according to the driver of the present invention electric current that can automatically afford redress, thereby obtain lower total harmonic distortion and higher power factor.
Preferably, control unit comprises: the first control output end, for exporting the first control signal of controlling current compensation unit; First detects input, for detection of input voltage; And second detect input, for detection of output voltage.Control unit is the control chip at any type with comparison and control function that can commercially obtain.In design of the present invention, without for controlling current compensation unit for increasing other control unit, current compensation unit can be used same control unit jointly with power factor correction unit, and this has reduced the manufacturing cost according to driver of the present invention to a great extent.
A preferred design according to the present invention proposes, and at input voltage, during lower than output voltage, current compensation unit provides the offset current with the waveform consistent with the waveform of input voltage.For example input voltage is sinusoidal wave, so offset current is also sinusoidal wave.
Another preferred design according to the present invention proposes, stage at input voltage lower than threshold voltage, current compensation unit provides first offset current with the waveform consistent with the waveform of input voltage, and at input voltage higher than threshold voltage and lower than stage of output voltage, current compensation unit provides the second constant offset current, wherein, threshold voltage is lower than output voltage.In present design, for example input voltage is sinusoidal wave, and sine-shaped offset current was provided so before reaching threshold voltage, after surpassing threshold voltage, provides constant offset current.
Preferably, current compensation unit comprises: the first dividing potential drop branch road; The second dividing potential drop branch road; And the first transistor, wherein the work electrode of the first transistor is connected to the output of rectifier bridge by the first dividing potential drop branch road, the reference electrode ground connection of the first transistor, and the control electrode of the first transistor is connected to the first control output end, one end ground connection of the second dividing potential drop branch road, the other end is connected to the control electrode of the first transistor and the intermediate node between the first control output end.In design of the present invention, when input voltage is less than output voltage, the first transistor is switched on, thereby between the output of rectifier bridge and ground, form path by current compensation unit, due to generation current in this path, thereby drawn high the electric current in the output output of rectifier bridge, and then reduced total harmonic distortion.
Advantageously, the first dividing potential drop branch road comprises at least one first resistance, and the second dividing potential drop branch road comprises at least one second resistance.These resistance are divider resistance, and can use a resistance or a plurality of resistance in each dividing potential drop branch road, and this size according to the input voltage of driver is determined.
Optionally, current compensation unit comprises the first dividing potential drop branch road, the second dividing potential drop branch road, the 3rd dividing potential drop branch road, the first transistor, transistor seconds, and first diode, wherein, one end of the first dividing potential drop branch road is connected to the output of rectifier bridge, the control electrode of transistor seconds is connected to the intermediate node between the other end of the first dividing potential drop branch road and the negative pole of the first diode, the plus earth of the first diode, the work electrode of transistor seconds is connected to the output of rectifier bridge, the reference electrode of transistor seconds is connected to the work electrode of the first transistor by the 3rd dividing potential drop branch road, the control electrode of the first transistor is connected to the first control output end, one end ground connection of the second dividing potential drop branch road, the other end is connected to the control electrode of the first transistor and the intermediate node between the first control output end.In present design, provide by stages sinusoidal wave offset current and constant offset current.
Advantageously, the first dividing potential drop branch road comprises at least one first resistance, and the second dividing potential drop branch road comprises at least one second resistance, and the 3rd dividing potential drop branch road comprises at least one the 3rd resistance.These resistance are divider resistance, and can use a resistance or a plurality of resistance in each dividing potential drop branch road, and this size according to the input voltage of driver is determined.
Further advantageously, the first diode is Zener diode, and the Zener voltage of the first diode limits threshold voltage.
According to the present invention, propose, driver also comprises: the 4th dividing potential drop branch road; The 5th dividing potential drop branch road; The 6th dividing potential drop branch road and the 7th dividing potential drop branch road, wherein the first detection input is connected to the output of rectifier bridge by the 4th dividing potential drop branch road, one end of the 5th dividing potential drop branch road is connected to the intermediate node between the first detection input and the 4th dividing potential drop branch road, the other end ground connection of the 5th dividing potential drop branch road, second detects input is connected to the output of power factor correction unit by the 6th dividing potential drop branch road, and one end of the 7th dividing potential drop branch road is connected to the intermediate node between the second detection input and the 6th dividing potential drop branch road, the other end ground connection of the 7th dividing potential drop branch road.Control unit is by above-mentioned dividing potential drop branch road Gather and input voltage and output voltage.
Advantageously, the 4th dividing potential drop branch road comprises at least one the 4th resistance, and the 5th dividing potential drop branch road comprises at least one the 5th resistance, and the 6th dividing potential drop branch road comprises at least one the 6th resistance, and the 7th dividing potential drop branch road comprises at least one the 7th resistance.These resistance are divider resistance, and can use a resistance or a plurality of resistance in each dividing potential drop branch road, and this size according to the input voltage of driver is determined.
Further preferably, control unit also comprises the second control output end, for exporting the second control signal of power ratio control factor correcting unit.
Advantageously, driver also comprises control signal amplifying circuit, and control signal amplifying circuit amplifies the second control signal driving power factor correcting unit.
Further advantageously, power factor correction unit is buck-type power factor correction circuit.
Another object of the present invention realizes by a kind of lighting device, and this lighting device comprises the driver of the above-mentioned type and by the luminescence component of this driver drives.Preferably, this luminescence component is LED luminescence component.LED luminescence component has that luminous efficiency is high, the life-span is long and the advantage such as energy-conserving and environment-protective.
It should be understood that the feature of different exemplary embodiment described herein can be bonded to each other if do not have other dated especially.
Accompanying drawing explanation
Accompanying drawing forms the part of this specification, for helping further to understand the present invention.These accompanying drawings illustrate embodiments of the invention, and are used for illustrating principle of the present invention together with specification.Identical parts represent with identical label in the accompanying drawings.Shown in figure:
Fig. 1 is the time dependent graph of a relation of input voltage, output voltage and input current;
Fig. 2 is the theory diagram according to driver of the present invention;
Fig. 3 is according to the circuit diagram of the first embodiment of driver of the present invention;
Fig. 4 is according to the circuit diagram of the second embodiment of driver of the present invention;
Fig. 5 is the offset current of sinusoidal wave form and the time dependent graph of a relation of input voltage;
Fig. 6 has sinusoidal wave part and the offset current of constant portion and the time dependent graph of a relation of input voltage.
Embodiment
Fig. 2 shows according to the theory diagram of driver 100 of the present invention.As seen from the figure, driver 100 comprises: the rectifier bridge 1 that is connected to power supply; Be connected to the power factor correction unit 2 of the output of rectifier bridge 1; And control unit 3, control unit 3 detects from the input voltage vin of the output of rectifier bridge 1 and from the output voltage V o of the output of power factor correction unit 2, wherein, driver 100 also comprises the current compensation unit 4 of the output that is connected to rectifier bridge 1,3 pairs of input voltage vin of control unit and output voltage V o compare, when input voltage vin is during lower than output voltage V o, control unit 3 is controlled the current compensation unit 4 electric current I com that affords redress.That is to say, when input voltage vin is during lower than output voltage V o, current compensation unit 4 makes to form path between the output of rectifier bridge 1 and ground, produces offset current Icom in this path, thereby improve the electric current of the output output of rectifier bridge 1, to reduce total harmonic distortion.
Because design of the present invention is the improvement that the driver to having existed in prior art carries out, so components and parts wherein, such as the concrete structure of rectifier bridge 1, power factor correction unit 2, control unit 3 etc., no longer this is described, and on above-mentioned components and parts Ke commercial market, easily obtains.In Fig. 3 and Fig. 4, only the concrete structure of current compensation unit 4 and current compensation unit 4 are carried out to exemplary description with the annexation of other components and parts.
Fig. 3 shows according to the circuit diagram of the first embodiment of driver 100 of the present invention.As seen from the figure, control unit 3 comprises: the first control output end 31, for exporting the first control signal S_1 that controls current compensation unit 4; The second control output end 32, for exporting the second control signal S_2 that controls described power factor correction unit 2; First detects input 33, for detection of input voltage vin; And second detect input 34, for detection of output voltage V o.
In addition, current compensation unit 4 comprises: the first dividing potential drop branch road 41; The second dividing potential drop branch road 42; And the first transistor Q1, wherein the work electrode of the first transistor Q1 is connected to the output of rectifier bridge 1 by the first dividing potential drop branch road 41, the reference electrode ground connection of the first transistor Q1, and the control electrode of the first transistor Q1 is connected to the first control output end 31, second dividing potential drop branch road 42 one end ground connection, the other end is connected to the control electrode of the first transistor Q1 and the intermediate node between the first control output end 31.In the present embodiment, the first dividing potential drop branch road 41 comprises three the first resistance R 1 that are one another in series and connect, R1 ', R1 ", the second dividing potential drop branch road 42 comprises second resistance R 2.Yet the quantity of above-mentioned resistance is not what fix, according to the requirement of design, can be provided with the resistance of varying number, to obtain different impedances.
In addition, driver 100 also comprises: the 4th dividing potential drop branch road 44, the 5th dividing potential drop branch road 45, the 6th dividing potential drop branch road 46 and the 7th dividing potential drop branch road 47, wherein the first detection input 33 is connected to the output of rectifier bridge 1 by the 4th dividing potential drop branch road 44, the 5th dividing potential drop branch road 45 one end is connected to the intermediate node between the first detection input 33 and the 4th dividing potential drop branch road 44, the other end ground connection of the 5th dividing potential drop branch road 45, second detects input 34 is connected to the output of power factor correction unit 2 by the 6th dividing potential drop branch road 46, and the 7th dividing potential drop branch road 47 one end is connected to the intermediate node between the second detection input 34 and the 6th dividing potential drop branch road 46, the other end ground connection of the 7th dividing potential drop branch road 47, wherein the 4th dividing potential drop branch road 44 comprises three the 4th resistance R 4, R4 ', R4 ", the 5th dividing potential drop branch road 45 comprises the 5th resistance R 5, the 6th dividing potential drop branch road 46 comprises the 6th resistance R 6, the 7th dividing potential drop branch road 47 comprises the 7th resistance R 7.
The quantity that it is emphasized that resistance in each dividing potential drop branch road at this is not what fix, can be provided with the resistance of varying number, to obtain different impedances according to the requirement of design.
In the first embodiment, control unit 3 is by being connected to the 4th resistance R 4 of the first detection input 33, R4 ', R4 " and the 5th resistance R 5 Gather and input voltage Vin; and gather output voltage V o by being connected to the 6th resistance R 6 and the 7th resistance R 7 of the second detection input 34; then input voltage vin and output voltage V o are compared; control unit 3 sends the second control signal S_2 power ratio control factor correcting unit 2 according to comparative result, with by the power factor controlling of output voltage V o in higher desired value.In input voltage vin during lower than output voltage V o, control unit 3 sends the first control signal S_1, to control the first transistor Q1, connect, thereby between the output of rectifier bridge 1 and ground, form the path through current compensation unit 4, in this path, produce offset current Icom, and then improve the electric current of the output output of rectifier bridge 1, and reduce total harmonic distortion.When the first transistor Q1 connects, input voltage vin is added in the first resistance R 1, R1 ', R1 " and on the first transistor Q1.At this moment this partial circuit is with respect to an equivalent resistance Requ.Requ=R1+R1 '+R1 "+Rds (on) Q1, equivalent resistance when wherein Rds (on) Q1 is the first transistor Q1 conducting.Thus, the offset current of acquisition is:
Figure 5 illustrates the offset current Icom of sinusoidal wave form and the time dependent graph of a relation of input voltage vin that according to the current compensation unit 4 of the driver 100 of the first embodiment of the present invention, produce.As seen from the figure, this offset current Icom is directly proportional to input voltage vin, and because input voltage vin is sinusoidal wave, so offset current Icom is also sinusoidal wave.
Fig. 4 shows according to the circuit diagram of the second embodiment of driver 100 of the present invention.Driver 100 in the second embodiment and the difference of the driver 100 in the first embodiment are only the structural difference of current compensation unit 4.As seen from the figure, current compensation unit 4 comprises the first dividing potential drop branch road 41, the second dividing potential drop branch road 42, the 3rd dividing potential drop branch road 43, the first transistor Q1, transistor seconds Q2, and the first diode D1, wherein, first dividing potential drop branch road 41 one end is connected to the output of rectifier bridge 1, the control electrode of transistor seconds Q2 is connected to the intermediate node between the other end of the first dividing potential drop branch road 41 and the negative pole of the first diode D1, the plus earth of the first diode D1, the work electrode of transistor seconds Q2 is connected to the output of rectifier bridge 1, the reference electrode of transistor seconds Q2 is connected to the work electrode of the first transistor Q1 by the 3rd dividing potential drop branch road 43, the control electrode of the first transistor Q1 is connected to the first control output end 31, second dividing potential drop branch road 42 one end ground connection, the other end is connected to the control electrode of the first transistor Q1 and the intermediate node between the first control output end 31, wherein, the first dividing potential drop branch road 41 comprises three the first resistance R 1 that are one another in series and connect, R1 ', R1 ", the second dividing potential drop branch road 42 comprises second resistance R 2, the 3rd dividing potential drop branch road 43 comprises the 3rd resistance R 3.Equally, the quantity of the resistance in each dividing potential drop branch road is not what fix, can be provided with the resistance of varying number, to obtain different impedances according to the requirement of design.In addition, the first diode D1 is Zener diode.
In the second embodiment shown in Fig. 4, control unit 3 is by being connected to the 4th resistance R 4 of the first detection input 33, R4 ', R4 " and the 5th resistance R 5 Gather and input voltage Vin; and gather output voltage V o by being connected to the 6th resistance R 6 and the 7th resistance R 7 of the second detection input 34; then input voltage vin and output voltage V o are compared; control unit 3 sends the second control signal S_2 power ratio control factor correcting unit 2 according to comparative result, with by power factor controlling in higher desired value.
With reference to shown in Fig. 6 to have sinusoidal wave part and the offset current Icom of constant portion and the time dependent graph of a relation of input voltage vin visible, in input voltage vin during lower than output voltage V o, control unit 3 sends the first control signal S_1, to control the first transistor Q1, connect, thereby form the path through current compensation unit 4 between the output of rectifier bridge 1 and ground.Yet, the stage of the threshold voltage Vz limiting lower than the Zener voltage by the first diode D1 in input voltage vin the grid source threshold voltage Vgs that is less than transistor seconds Q2, transistor seconds Q2 turn-offs, and the electric current I Q1 that now flows through the 3rd resistance R 3 is very little, the base current of supposing transistor seconds Q2 is Ig, offset current Icom in this stage is so: Icom=IQ1-Ig, because base current Ig is much smaller than the electric current I Q1 that flows through the 3rd resistance R 3, so the offset current Icom in this stage is approximately due to IQ1.In input voltage vin lower than threshold voltage Vz and be greater than stage of the grid source threshold voltage Vgs of transistor seconds Q2, transistor seconds Q2 connects, now the grid voltage Vg of transistor seconds Q2 equals input voltage vin, and the electric current I Q1 that therefore flows through the 3rd resistance R 3 is:
in this stage, grid voltage Vg changes with input voltage vin, so electric current I Q1 changes with input voltage, thereby obtains sine-shaped the first offset current Icom1.In input voltage vin, higher than threshold voltage Vz and lower than stage of output voltage V o, the grid voltage of transistor seconds Q2 is by clamped at threshold voltage Vz, and the electric current I Q1 that flows through thus the 3rd resistance R 3 is:
due to threshold voltage, Vz fixes, so electric current I Q1 is also constant, thereby obtains the second constant offset current Icom2.
In addition, respectively in two embodiment shown in Fig. 3 and Fig. 4, driver 100 also comprises control signal amplifying circuit 5, this control signal amplifying circuit 5 amplifies the second control signal S_2 driving power factor correcting unit 2, and power factor correction unit 2 is buck-type power factor correction circuit.
According to design of the present invention, control unit 3 might not need input voltage vin and output voltage V o to compare, and also can compare by input voltage vin with the value that input voltage Vo relatively approaches.In addition, the first transistor Q1 and transistor seconds Q2 can be selected from a kind of in metal-oxide-semiconductor, thyristor, relay and triode.
In addition, need to be ben at this, two embodiment described above are only schematically, for design principle of the present invention is described, it should not produce restriction to design principle of the present invention.According to design of the present invention, current compensation unit 4 not only can produce sine-shaped offset current, and constant offset current also can produce the offset current of other waveforms, or the combination of the offset current of different wave and constant offset current.
Although this illustrate and described specific embodiment, it will be appreciated by one skilled in the art that and do not deviating under the prerequisite of scope of the present invention, various execution modes optional and/or that be equal to can replace the specific embodiment describing and illustrate.The application is intended to cover any modification or the distortion of specific embodiment discussed herein.So the present invention is intended to only be limited by claim and equivalent thereof.
Reference number
1 rectifier bridge
2 power factor correction units
3 control units
31 first control output ends
32 second control output ends
33 first detect input
34 second detect input
4 current compensation unit
41 first dividing potential drop branch roads
42 second dividing potential drop branch roads
43 the 3rd dividing potential drop branch roads
44 the 4th dividing potential drop branch roads
45 the 5th dividing potential drop branch roads
46 the 6th dividing potential drop branch roads
47 the 7th dividing potential drop branch roads
5 control signal amplifying circuits
R1, R1 ', R1 " the first resistance
R2 the second resistance
R3 the 3rd resistance
R4, R4 ', R4 " the 4th resistance
R5 the 5th resistance
R6 the 6th resistance
R7 the 7th resistance
Equivalent resistance during Rds (on) Q1 Q1 conducting
Requ equivalent resistance
D1 the first diode
Q1 the first transistor
Q2 transistor seconds
Vin input voltage
Vo output voltage
Vz threshold voltage
Icom offset current
Icom1 the first offset current
Icom2 the second offset current
The base current of Ig Q2
IQ1 flows through the electric current of R3
The grid source threshold voltage of Vgs Q2
The grid voltage of Vg Q2
Vz threshold voltage
S_1 the first control signal
S_2 the second control signal
100 drivers
Claims (17)
1. the driver for lighting device (100), comprising: the rectifier bridge (1) that is connected to power supply, be connected to the power factor correction unit (2) of the output of described rectifier bridge (1), and control unit (3), described control unit (3) detects from the input voltage (Vin) of the output of described rectifier bridge (1) and from the output voltage (Vo) of the output of described power factor correction unit (2), it is characterized in that, described driver (100) also comprises the current compensation unit (4) of the output that is connected to described rectifier bridge (1), described control unit (3) compares described input voltage (Vin) and described output voltage (Vo), when described input voltage (Vin) is during lower than described output voltage (Vo), described control unit (3) is controlled described current compensation unit (4) electric current (Icom) that affords redress.
2. driver according to claim 1 (100), is characterized in that, described control unit (3) comprising: the first control output end (31), and for exporting the first control signal (S_1) of controlling described current compensation unit (4); First detects input (33), for detection of described input voltage (Vin); And second detect input (34), for detection of described output voltage (Vo).
3. driver according to claim 2 (100), it is characterized in that, at described input voltage (Vin), during lower than described output voltage (Vo), described current compensation unit (4) provides the described offset current (Icom) with the waveform consistent with the waveform of described input voltage (Vin).
4. driver according to claim 2 (100), it is characterized in that, in stage at described input voltage (Vin) lower than threshold voltage (Vz), described current compensation unit (4) provides first offset current (Icom1) with the waveform consistent with the waveform of described input voltage (Vin); And at described input voltage (Vin) higher than described threshold voltage (Vz) and lower than stage of described output voltage (Vo), described current compensation unit (4) provides constant the second offset current (Icom2), wherein, described threshold voltage (Vz) is lower than described output voltage (Vo).
5. driver (100) according to claim 3, is characterized in that, described current compensation unit (4) comprising: the first dividing potential drop branch road (41); The second dividing potential drop branch road (42); And the first transistor (Q1), the work electrode of wherein said the first transistor (Q1) is connected to the output of described rectifier bridge (1) by described the first dividing potential drop branch road (41), the reference electrode ground connection of described the first transistor (Q1), and the control electrode of described the first transistor (Q1) is connected to described the first control output end (31), one end ground connection of described the second dividing potential drop branch road (42), the other end is connected to the control electrode of described the first transistor (Q1) and the intermediate node between described the first control output end (31).
6. driver according to claim 5 (100), is characterized in that, described the first dividing potential drop branch road (41) comprises that (R1, R1 ', R1 "), described the second dividing potential drop branch road (42) comprises at least one second resistance (R2) at least one first resistance.
7. driver according to claim 4 (100), is characterized in that, described current compensation unit (4) comprises the first dividing potential drop branch road (41), the second dividing potential drop branch road (42), the 3rd dividing potential drop branch road (43), the first transistor (Q1), transistor seconds (Q2), and first diode (D1), wherein, one end of described the first dividing potential drop branch road (41) is connected to the output of described rectifier bridge (1), the control electrode of described transistor seconds (Q2) is connected to the intermediate node between the other end of described the first dividing potential drop branch road (41) and the negative pole of described the first diode (D1), the plus earth of described the first diode (D1), the work electrode of described transistor seconds (Q2) is connected to the output of described rectifier bridge (1), the reference electrode of described transistor seconds (Q2) is connected to the work electrode of described the first transistor (Q1) by described the 3rd dividing potential drop branch road (43), the control electrode of described the first transistor (Q1) is connected to described the first control output end (31), one end ground connection of described the second dividing potential drop branch road (42), the other end is connected to the control electrode of described the first transistor (Q1) and the intermediate node between described the first control output end (31).
8. driver according to claim 7 (100), it is characterized in that, described the first dividing potential drop branch road (41) comprises at least one first resistance (R1, R1 ', R1 "); described the second dividing potential drop branch road (42) comprises at least one second resistance (R2), described the 3rd dividing potential drop branch road (43) comprises at least one the 3rd resistance (R3).
9. driver according to claim 7 (100), is characterized in that, described the first diode (D1) is Zener diode.
10. driver according to claim 9 (100), is characterized in that, the Zener voltage of described the first diode (D1) limits described threshold voltage (Vz).
11. according to the driver described in any one in claim 2 to 10 (100), it is characterized in that, described driver (100) also comprises: the 4th dividing potential drop branch road (44), the 5th dividing potential drop branch road (45), the 6th dividing potential drop branch road (46) and the 7th dividing potential drop branch road (47), wherein said first detects input (33) is connected to the output of described rectifier bridge (1) by described the 4th dividing potential drop branch road (44), one end of described the 5th dividing potential drop branch road (45) is connected to the described first intermediate node detecting between input (33) and described the 4th dividing potential drop branch road (44), the other end ground connection of described the 5th dividing potential drop branch road (45), described second detects input (34) is connected to the output of described power factor correction unit (2) by described the 6th dividing potential drop branch road (46), and one end of described the 7th dividing potential drop branch road (47) is connected to the described second intermediate node detecting between input (34) and described the 6th dividing potential drop branch road (46), the other end ground connection of described the 7th dividing potential drop branch road (47).
12. drivers according to claim 11 (100), it is characterized in that, described the 4th dividing potential drop branch road (44) comprises at least one the 4th resistance (R4, R4 ', R4 "); described the 5th dividing potential drop branch road (45) comprises at least one the 5th resistance (R5), described the 6th dividing potential drop branch road (46) comprises at least one the 6th resistance (R6), described the 7th dividing potential drop branch road (47) comprises at least one the 7th resistance (R7).
13. according to the driver described in any one in claim 2 to 10 (100), it is characterized in that, described control unit (3) also comprises the second control output end (32), for exporting the second control signal (S_2) of controlling described power factor correction unit (2).
14. drivers according to claim 13 (100), it is characterized in that, described driver (100) also comprises control signal amplifying circuit (5), and described control signal amplifying circuit (5) amplifies described the second control signal (S_2) and drives described power factor correction unit (2).
15. according to the driver described in any one in claim 1 to 10 (100), it is characterized in that, described power factor correction unit (2) is buck-type power factor correction circuit.
16. 1 kinds of lighting devices, is characterized in that, described lighting device comprises according to the driver described in any one in claim 1 to 15 (100) and the luminescence component that driven by described driver (100).
17. lighting devices according to claim 16, is characterized in that, described luminescence component is LED luminescence component.
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| CN201210200466.7A CN103517489B (en) | 2012-06-14 | 2012-06-14 | Driver for lighting device and the lighting device with the driver |
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| CN201210200466.7A CN103517489B (en) | 2012-06-14 | 2012-06-14 | Driver for lighting device and the lighting device with the driver |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333963A (en) * | 2014-09-01 | 2015-02-04 | 友达光电股份有限公司 | Light emitting diode driving method |
| CN105282900A (en) * | 2014-06-19 | 2016-01-27 | 立锜科技股份有限公司 | Luminescence element driving circuit and driving method thereof |
| CN105337485A (en) * | 2014-06-03 | 2016-02-17 | 欧司朗股份有限公司 | Power factor correction (PFC) circuit, light emitting diode (LED) driving circuit and illumination device |
| CN105353659A (en) * | 2015-11-27 | 2016-02-24 | 宁波福尔达智能科技有限公司 | Heavy load control circuit for dome lamp module |
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| CN101014920A (en) * | 2004-06-28 | 2007-08-08 | 国际整流器公司 | High frequency partial boost power factor correction control circuit and method |
| CN101145693A (en) * | 2006-09-12 | 2008-03-19 | 深圳Tcl新技术有限公司 | Power factor correction circuit |
| KR20110030244A (en) * | 2009-09-16 | 2011-03-23 | 김대섭 | Power supply apparatus for light-emitting diode |
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| CN101014920A (en) * | 2004-06-28 | 2007-08-08 | 国际整流器公司 | High frequency partial boost power factor correction control circuit and method |
| CN101145693A (en) * | 2006-09-12 | 2008-03-19 | 深圳Tcl新技术有限公司 | Power factor correction circuit |
| KR20110030244A (en) * | 2009-09-16 | 2011-03-23 | 김대섭 | Power supply apparatus for light-emitting diode |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337485A (en) * | 2014-06-03 | 2016-02-17 | 欧司朗股份有限公司 | Power factor correction (PFC) circuit, light emitting diode (LED) driving circuit and illumination device |
| CN105282900A (en) * | 2014-06-19 | 2016-01-27 | 立锜科技股份有限公司 | Luminescence element driving circuit and driving method thereof |
| CN105282900B (en) * | 2014-06-19 | 2017-11-17 | 立锜科技股份有限公司 | The driving method of light emitting element driving circuit and light-emitting element circuit |
| CN104333963A (en) * | 2014-09-01 | 2015-02-04 | 友达光电股份有限公司 | Light emitting diode driving method |
| CN105353659A (en) * | 2015-11-27 | 2016-02-24 | 宁波福尔达智能科技有限公司 | Heavy load control circuit for dome lamp module |
| CN105353659B (en) * | 2015-11-27 | 2018-05-08 | 宁波福尔达智能科技有限公司 | Roof lamp module heavy load control circuit |
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| CN103517489B (en) | 2017-12-26 |
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